I don't know, but it does not make much sense to publish Trinity when Rebellion is already available which is basically Trinity 1.5...
I know, but it was on the "coming soon list". And it might be interesting for people who want to play vanilla, Entrenchment, Diplomacy without the Rebellion stuff. At least this is GOG and there might be some customers here who want to play the old version. ;)
And it's a bummer if a release is canceled without any information.